Because most English are fed up with Scottish MP's having a say over English lives, when they already vote for Scottish laws. If we must, then cut all ties but we do deserve our own parliament with our own MP's. Why not let the MP's of Pakistan or France vote in our parliament? Laughable, yes, but no more so than having Scottish, & Welsh MP's!
The English people need their own parliament, much like we have granted to Scotland, Wales & N Ireland, so that we are not misrepresented by MP's who vote one way in their parliament and then the party way in the UK parliament. We do not want to go the EU route of regions. English votes for English MP's for English laws.